I wouldn't use rayon embroidery thread in anything that is going to have use or be washed a lot. I did this about 10 years ago on the quilt. Now, I have a quilt with the quilting coming out a will, I guess, have to requilt it at some point. Rayon embroidery thread isn't made for much use an repeated washings. It's fine for wall hangings and garments that don't get washed a lot. But it doesn't appear to stand up well to repeated washings when used for quilting.